import csv
def get_unit_infor():
    a = []
    with open('demands.csv', 'r') as csvfile:
        reader = csv.reader(csvfile)
        for i, rows in enumerate(reader):
            a.append(rows)
    del (a[0])
    temp = []
    for i in range(0, len(a)):
        temp.append(a[i][3])
    # print(temp)
    new_list = []
    for i in temp:
        if i not in new_list:
            new_list.append(i)
    return new_list